I have PCOS and ovulated on my own off the pill, though it was typically not until cd 30-50, or anywhere in between. If I ovulated by cd 30, that was a *good* cycle. AF followed 14 days later like clock work, whether or not I ovulated on day 30 or 50 or 90 (which happened from time to time).
I never ovulated on clomid. Well, I never waited past cd 35 before taking progesterone so I could start the madness all over again.
After miserably failing clomid, we did injectables. Ovulated on cd 19, got pg with twin girls.
They were 11 weeks old when I got AF. Out of nowhere. Ovulated around cd 21 and got AF again when they were 16 weeks old. They were both EBF by the way, but sleeping well at night. I got pg 3 weeks later when they were 19 weeks old. Positive pg test right around the time they turned 5 months old.
After #3 was born, I was *terrified* of getting pg again. I had 13 month old twins and a newborn. It was crazy. AF showed up at 8 weeks post-partum that time. Again, EBF, but good sleeper at night. I immediately went on the pill, it obviously screwed with my supply, went off again and we used condoms and a lot of prayer to not get pg again.
Had AF every 5-6 weeks like clock work while still nursing #3. Once weaned, I went back on the pill.
Fast forward 3.5 years. Off the pill (long story, not trying to get pg though). Was having 70-90 day cycles. Then I had a cycle that was 40-something days long that made me nervous about getting pg again. Went to get pills filled on day 28 exactly, right around the time I'd normally start watching for signs of ovulation. Nurse said to take a pg test 'just in case'. I thought 'I haven't even ovulated yet!' I have VERY CLEAR cervical mucous every single time I've ever ovulated...exactly 14 days prior to AF. I had NONE that cycle.
And I was very much pg with #4. She's now 15 months old.
AF returned at 9 weeks post-partum, continuing like clock work every 35-40 days until she was eating lots of table food, then it tapered off to ever 40-60 days. At that point, DH was coming home from Iraq, and I went back on the pill.
So...long story even longer. If you don't want more babies, then you need to use reliable birth control. Period. (no pun intended)